COMPUTER NETWORKS AND COMMUNICATIONS
NETWORK SECURITY AND CYBERSECURITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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secret
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cipher
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key
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none of the mentioned
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Detailed explanation-1: -A key is a number (or a set of numbers) that the cipher operates on, as an algorithm.
Detailed explanation-2: -If the private key is used for encryption, then the related public key is used for decryption. Asymmetric cryptography involves a pair of keys to encrypt and decrypt data. The two participants in the asymmetric encryption workflow are the sender and the receiver.
Detailed explanation-3: -Definition(s): Secret, cryptographic key that is used by the Key Expansion routine to generate a set of Round Keys; can be pictured as a rectangular array of bytes, having four rows and Nk columns.
Detailed explanation-4: -Symmetric encryption requires that both the sender and receiver have the same key and each computes a common key that is subsequently used. Two of the most common symmetric encryption standards are known as Data Encryption Standard (DES) and Advanced Encryption Standard (AES).
Detailed explanation-5: -The Caesar cipher is named after Julius Caesar, who, according to Suetonius, used it with a shift of three (A becoming D when encrypting, and D becoming A when decrypting) to protect messages of military significance.